Why The American Centrifugal Is More Economical 



Than Any Compound Plunger Pump Yet Devised 



As A Waterworks Pump 



IF YOU were to install an American Centrifugal Waterworks Plant of 100,000,000 gallons daily capacity 

 there would be no moie equipment than is shown in the above illustration; you would require only the 

 simple foundations illustrated and a very small building to house the pumps and either or both of the 

 pumps can be used independently as single stage pumps delivering water against 45 Ibs. pressure or by merely 

 closing two valves and opening another, they can be combined into a two stage fire pressure pump, delivering 

 water against 90 Ibs. pressure. 



It's a remarkable thing that in making a com- 

 parison between centrifugal pumps and plunger 

 pumps in water works installations in recent arti- 

 cles appearing in engineering journals, advocates 

 of the latter type of pump have figured the ef- 

 ficiency of the plunger pump at 91.5 per cent, and 

 the centrifugal at 65 per cent, and in not a single 

 instance has been considered the additional ex- 

 pense and greater interest on the investment of the 

 far more expensive foundations and much larger 

 housing required for the plunger pumps. 



American centrifugals develop up to 82 per cent 

 efficiencies, instead of 65 per cent, and since they 

 have no valves to wear out, they maintain prac- 

 tically their original efficiencies, whereas the aver- 

 age efficiency of a plunger pump is nearly always 

 iar below Its rated efficiency. 



Only one man on each watch is required to at- 

 tend a 100,000, 000-gallon daily capacity water 

 works plant of American centrifugals, as com- 

 pared with three to five for the same plant com- 

 posed of plunger pumps. 



Owing to the exceptionally simple designs of 

 American Centrifugals, there is practically nothing 

 to get out of order, with the result that few re- 

 pairs are required as compared with the frequent 

 shut downs and expensive repairs required with 

 complicated plunger pumps. 



Here are the costs that must be considered to 

 determine the relative economy of these types of 

 pumps as they are and not as they have been 

 figured by advocates of plunger pumps. 



Two to five times the ground area required for 

 the plunger pumps. 



Two to five times the expense for housing the 

 plunger pumps. 



Two to five times the expense for foundations 

 for the plunger pumps. 



Two to five times the initial cost for the plunger 

 pumps. 



Two to five times the expense for attendance for 

 the plunger pumps. 



Two to five times the cost for repairs for the 

 plunger pumps. 



Two to five times the pumping time lost in mak- 

 ing repairs to the plunger pumps. 



Interest charged against this entire greater in- 

 vestment, including ground, buildings and founda- 

 tions instead of the pump alone as is now the usual 

 custom. 



And then compare the 10 to 15 per cent greater 

 efficiency of the best plunger pumps, which is the 

 actual efficiency developed greater than the 

 American Centrifugals, instead of 25 to 30 per cent, 

 which is the claimed greater efficiency of the best 

 compound triple expansion plunger pumps, and it 

 .must be evident to any unbiased mind that no 

 plunger pump yet devised will equal the actual 

 economy of the American Centrifugal. 



If you are interested in thU greater economy write for General Centrifugal 

 Catalog No. 117, the most complete centrifugal pump catalog published. 



The American Well Works 



General Office and Works: Aurora, 111. 

 Chicago Office: First National Bank Building 



